ES484438A1 - IMPROVEMENTS IN FM SIGNAL DEMODULATORS WITH DEFECTS DETECTION - Google Patents
IMPROVEMENTS IN FM SIGNAL DEMODULATORS WITH DEFECTS DETECTIONInfo
- Publication number
- ES484438A1 ES484438A1 ES484438A ES484438A ES484438A1 ES 484438 A1 ES484438 A1 ES 484438A1 ES 484438 A ES484438 A ES 484438A ES 484438 A ES484438 A ES 484438A ES 484438 A1 ES484438 A1 ES 484438A1
- Authority
- ES
- Spain
- Prior art keywords
- output signals
- signals
- oscillator output
- phase
- given
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 title abstract 3
- 230000007547 defect Effects 0.000 abstract 2
- 230000007257 malfunction Effects 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
- H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
- H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present
- H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/87—Regeneration of colour television signals
- H04N9/88—Signal drop-out compensation
- H04N9/882—Signal drop-out compensation the signal being a composite colour television signal
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Television Signal Processing For Recording (AREA)
- Optical Recording Or Reproduction (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Perfeccionamientos en demoduladores de señal de FM con detección de defectos, del tipo que se disponen para un sistema de traducción de una señal que comprende una fuente de ondas portadoras, cuya frecuencia instantánea está sujeta a variación en una gama de desviación dada, estando sujeta la fuente aleatoriamente a ocasiones de funcionamiento defectuoso durante las cuales la frecuencia instantánea aparece de las ondas portadoras se desvía de la gama de desviación dada, caracterizados por un bucle bloqueado en fase que tiene un detector de fase y un oscilador controlado por voltaje, cuyo detector de fase responde a primeras señales correspondientes a las ondas portadoras y a las señales de salida del oscilador para proporcionar señales de salida del detector de fase para alterar la frecuencia de las señales de salida del oscilador en la dirección necesaria para mantener la fase relativa entre las primeras señales y las señales de salida del oscilador dentro de una cierta gama de valores, ymedios de detección de defectos que responden a las primeras señales y a las señales de salida del oscilador para proporcionar una señal de indicación de defecto cuando la fase relativa entre las primeras señales y las señales de salida del oscilador se desvía de una gama dada de valores, correspondiendo la desviación a una aparición de las ocasiones de funcionamiento defectuoso, y para proporcionar una señal de nivel de referencia cuando la fase relativa entre las primeras señales de salida del oscilador está dentro de la gama de valores dada.Improvements in FM signal demodulators with flaw detection, of the type that are arranged for a signal translation system comprising a carrier wave source, whose instantaneous frequency is subject to variation in a given deviation range, the source randomly to malfunction occasions during which the instantaneous frequency of the carrier waves deviates from the given deviation range, characterized by a phase-locked loop having a phase detector and a voltage-controlled oscillator, whose detector of phase responds to first signals corresponding to the carrier waves and oscillator output signals to provide phase detector output signals to alter the frequency of the oscillator output signals in the direction necessary to maintain the relative phase between the first signals and the oscillator output signals within a certain value range s, and defect detection means that respond to the first signals and the oscillator output signals to provide a defect indication signal when the relative phase between the first signals and the oscillator output signals deviates from a given range of values, the deviation corresponding to an occurrence of malfunction occasions, and to provide a reference level signal when the relative phase between the first oscillator output signals is within the given value range.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/948,013 US4203134A (en) | 1978-10-02 | 1978-10-02 | FM Signal demodulator with defect detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES484438A1 true ES484438A1 (en) | 1980-04-16 |
Family
ID=25487124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES484438A Expired ES484438A1 (en) | 1978-10-02 | 1979-09-25 | IMPROVEMENTS IN FM SIGNAL DEMODULATORS WITH DEFECTS DETECTION |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US4203134A (en) |
| JP (1) | JPS5555450A (en) |
| AT (1) | AT384333B (en) |
| AU (1) | AU531092B2 (en) |
| CA (1) | CA1129094A (en) |
| DE (1) | DE2939402C2 (en) |
| EG (1) | EG13936A (en) |
| ES (1) | ES484438A1 (en) |
| FI (1) | FI68333C (en) |
| FR (1) | FR2438375B1 (en) |
| GB (1) | GB2032738B (en) |
| HK (1) | HK7983A (en) |
| IT (1) | IT1123352B (en) |
| MY (1) | MY8400054A (en) |
| NL (1) | NL7907301A (en) |
| PL (1) | PL133032B1 (en) |
| SE (1) | SE435885B (en) |
| SG (1) | SG61682G (en) |
| SU (1) | SU1033016A3 (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4286283A (en) * | 1979-12-20 | 1981-08-25 | Rca Corporation | Transcoder |
| JPS5715207A (en) * | 1980-07-03 | 1982-01-26 | Victor Co Of Japan Ltd | Frequency-characteristic correction device of rotary information recording medium reproducing device |
| US4376289A (en) * | 1980-10-27 | 1983-03-08 | Rca Corporation | Self-enabling dropout corrector |
| US4327431A (en) * | 1980-11-07 | 1982-04-27 | Rca Corporation | Video disc player with variable offset RFI reduction circuit |
| US4327432A (en) * | 1980-11-07 | 1982-04-27 | Rca Corporation | Video disc player with RFI reduction circuit |
| US4364119A (en) * | 1980-11-21 | 1982-12-14 | Rca Corporation | Video disc player with RFI reduction circuit including a signal product generator |
| US4385374A (en) * | 1980-11-21 | 1983-05-24 | Rca Corporation | Video disc player with RFI reduction circuit including an AGC amplifier and dual function peak detector |
| US4361881A (en) * | 1980-11-21 | 1982-11-30 | Rca Corporation | Video disc player with RFI reduction circuit including signal subtraction |
| US4353093A (en) * | 1981-05-11 | 1982-10-05 | Rca Corporation | Impulse noise reduction system for TV receivers |
| US4418363A (en) * | 1981-06-24 | 1983-11-29 | Rca Corporation | Video disc player with RFI reduction circuit including sync tip clamp |
| JPS5834031U (en) * | 1981-08-30 | 1983-03-05 | 加藤 一郎 | barometer pointer |
| US4481616A (en) * | 1981-09-30 | 1984-11-06 | Rca Corporation | Scanning capacitance microscope |
| US4476498A (en) * | 1982-02-05 | 1984-10-09 | Rca Corporation | Deviation detector for FM video recording system |
| US4462048A (en) * | 1982-02-11 | 1984-07-24 | Rca Corporation | Noise reduction circuitry for audio signals |
| US4514763A (en) * | 1982-10-29 | 1985-04-30 | Rca Corporation | Sound signal and impulse noise detector for television receivers |
| JPS6087469A (en) * | 1983-10-19 | 1985-05-17 | Hitachi Ltd | dropout compensator |
| JPS6077114U (en) * | 1983-11-01 | 1985-05-29 | パイオニア株式会社 | FM signal demodulator |
| JPS61970A (en) * | 1984-06-13 | 1986-01-06 | Matsushita Electric Ind Co Ltd | Abnormal signal detection device |
| DE3613473A1 (en) * | 1986-04-22 | 1987-10-29 | Thomson Brandt Gmbh | Video recorder with improved sound reproduction |
| US4680651A (en) * | 1986-08-19 | 1987-07-14 | Eastman Kodak Company | Timing signal dropout compensation circuit |
| DE3702856A1 (en) * | 1987-01-31 | 1988-08-11 | Philips Patentverwaltung | CIRCUIT ARRANGEMENT FOR DETECTING THE EXCEEDANCE OF A PRESET FREQUENCY RANGE RANGE |
| US4754467A (en) * | 1987-07-01 | 1988-06-28 | Motorola, Inc. | Digital signal detection with signal buffering and message insertion |
| US4906942A (en) * | 1987-12-17 | 1990-03-06 | Mitsubishi Denki Kabushiki Kaisha | Frequency demodulator with reversal phenomenon compensation |
| JPH01296704A (en) * | 1988-05-24 | 1989-11-30 | Matsushita Electric Ind Co Ltd | FM demodulator |
| US4943858A (en) * | 1989-02-23 | 1990-07-24 | Matsushita Electric Industrial Co., Ltd. | TV signal recording and reproducing apparatus employing a digital interface and including signal drop-out compensation |
| DE3920004A1 (en) * | 1989-06-20 | 1991-01-03 | Philips Patentverwaltung | METHOD AND ARRANGEMENT FOR NOISE REDUCTION OF A DIGITAL SIGNAL |
| DE19757315A1 (en) * | 1997-12-22 | 1999-06-24 | Thomson Brandt Gmbh | Standby signal for FM demodulator |
| DE19830130B4 (en) * | 1998-07-06 | 2007-01-18 | Robert Bosch Gmbh | Circuit arrangement for a PLL circuit (phase-locked loop) for frequency multiplication |
| TWI756730B (en) * | 2020-07-03 | 2022-03-01 | 立積電子股份有限公司 | Frequency modulation demodulation device and control method of frequency modulation demodulation device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3582809A (en) * | 1968-09-06 | 1971-06-01 | Signetics Corp | Phased locked loop with voltage controlled oscillator |
| US3842194A (en) * | 1971-03-22 | 1974-10-15 | Rca Corp | Information records and recording/playback systems therefor |
| JPS5550640B2 (en) * | 1973-03-09 | 1980-12-19 | ||
| AR207776A1 (en) * | 1974-06-06 | 1976-10-29 | Rca Corp | ARRANGEMENT TO PLAY BACK A RECORDING OF SUCCESSIVE COLOR IMAGES |
| US4001496A (en) * | 1974-06-06 | 1977-01-04 | Rca Corporation | Defect detection and compensation apparatus for use in an fm signal translating system |
| US3967311A (en) * | 1974-11-12 | 1976-06-29 | Rca Corporation | Velocity correction for video discs |
| JPS5440331B2 (en) * | 1975-03-05 | 1979-12-03 | ||
| GB1536851A (en) * | 1975-03-10 | 1978-12-20 | Rca Corp | Video carrier wave defect detection and compensation |
| NL7503049A (en) * | 1975-03-14 | 1976-09-16 | Philips Corp | DEVICE FOR COMPENSATION OF SIGNAL FAILURES IN AN ANGLE MODULATED SIGNAL. |
-
1978
- 1978-10-02 US US05/948,013 patent/US4203134A/en not_active Expired - Lifetime
-
1979
- 1979-09-17 EG EG553/79A patent/EG13936A/en active
- 1979-09-25 AU AU51179/79A patent/AU531092B2/en not_active Ceased
- 1979-09-25 FI FI792978A patent/FI68333C/en not_active IP Right Cessation
- 1979-09-25 SE SE7907946A patent/SE435885B/en unknown
- 1979-09-25 ES ES484438A patent/ES484438A1/en not_active Expired
- 1979-09-26 IT IT26033/79A patent/IT1123352B/en active
- 1979-09-26 GB GB7933313A patent/GB2032738B/en not_active Expired
- 1979-09-28 CA CA336,627A patent/CA1129094A/en not_active Expired
- 1979-09-28 DE DE2939402A patent/DE2939402C2/en not_active Expired
- 1979-10-01 JP JP12727279A patent/JPS5555450A/en active Granted
- 1979-10-01 SU SU792820502A patent/SU1033016A3/en active
- 1979-10-01 NL NL7907301A patent/NL7907301A/en not_active Application Discontinuation
- 1979-10-01 FR FR7924404A patent/FR2438375B1/en not_active Expired
- 1979-10-02 AT AT0643779A patent/AT384333B/en not_active IP Right Cessation
- 1979-10-02 PL PL1979218690A patent/PL133032B1/en unknown
-
1982
- 1982-12-07 SG SG616/82A patent/SG61682G/en unknown
-
1983
- 1983-03-03 HK HK79/83A patent/HK7983A/en not_active IP Right Cessation
-
1984
- 1984-12-30 MY MY54/84A patent/MY8400054A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ATA643779A (en) | 1987-03-15 |
| PL218690A1 (en) | 1980-08-11 |
| FI792978A7 (en) | 1980-04-03 |
| IT1123352B (en) | 1986-04-30 |
| GB2032738B (en) | 1982-09-29 |
| AU531092B2 (en) | 1983-08-11 |
| JPS5555450A (en) | 1980-04-23 |
| HK7983A (en) | 1983-03-03 |
| SE7907946L (en) | 1980-04-03 |
| FI68333C (en) | 1985-08-12 |
| PL133032B1 (en) | 1985-05-31 |
| AU5117979A (en) | 1980-04-17 |
| DE2939402A1 (en) | 1980-04-17 |
| IT7926033A0 (en) | 1979-09-26 |
| US4203134A (en) | 1980-05-13 |
| JPS6120942B2 (en) | 1986-05-24 |
| CA1129094A (en) | 1982-08-03 |
| SG61682G (en) | 1983-09-02 |
| DE2939402C2 (en) | 1985-03-21 |
| EG13936A (en) | 1983-09-30 |
| FR2438375B1 (en) | 1986-06-13 |
| GB2032738A (en) | 1980-05-08 |
| FI68333B (en) | 1985-04-30 |
| SU1033016A3 (en) | 1983-07-30 |
| SE435885B (en) | 1984-10-22 |
| NL7907301A (en) | 1980-04-08 |
| AT384333B (en) | 1987-10-27 |
| MY8400054A (en) | 1984-12-31 |
| FR2438375A1 (en) | 1980-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19990601 |